By ANDREW E. KRAMER

Published: June 28, 2008

The revolving door between politics and business in Russia spun on Friday as Gazprom shareholders elected former prime minister Viktor A. Zubkov as chairman of the board, replacing Dmitri A. Medvedev, who stepped down after he succeeded Vladimir V. Putin as president. The company's chief executive, Aleksei B. Miller, retained his position. Also at the meeting, Gazprom floated a proposal to expand its retail business in Western Europe with a chain of natural gas fueling stations for passenger cars.